To force payment go to the plans or usage page. Click on lost/stolen. Suspend your service. Log out/in. Resume your service. Your plan should automatically reactivate. Your overview page may not update right way. Log out and reboot.
To contact customer support : Submit a support ticket via SIMon the chat bot Click here
Or if you cannot submit a ticket via SIMon then Click here ....for additional member supplied info.
You have to manually reactivate service.
If you made a manual payment full plan cost, do you see reactivate button? If yes, click on it, then wait 2-3 minutes, reboot your phone. What is the account balance?
If account already has amount for full plan cost try adding 1$ manually to the account balance to trigger reactivation process.